Normal-pressure tool changing cutterhead with freezing function

Abstract

The invention discloses a constant-pressure tool changing cutterhead with a freezing function. The constant-pressure tool changing cutterhead comprises a circular cutterhead body; the circular cutterhead body comprises a plurality of normal-pressure tool changing radial arms and a plurality of auxiliary beams; the plurality of normal-pressure tool changing radial arms are respectively connected with the plurality of auxiliary beams, and a plurality of normal-pressure tool changing tools are arranged on the normal-pressure tool changing radial arms; refrigerating pipelines are arranged on the lateral side faces of the normal-pressure tool changing radial arms, inner panels, the outer surfaces of the panels or the interiors of the panels, the refrigerating pipelines are provided with first inlets and outlets used for injecting or discharging low-temperature cooling liquid, heat insulation pipelines are arranged between the refrigerating pipelines and a cutterhead flange, and the heat insulation pipelines are provided with second inlets and outlets used for injecting or discharging heat insulation liquid. By means of the normal-pressure tool changing cutterhead with the freezing function, the normal-pressure tool changing cutterhead can be adopted for frequently changing tools, a tunnel face can be frozen by arranging the freezing pipelines, and it can be guaranteed that the cutterhead enters an excavation bin to work under special conditions. The construction efficiency and the equipment safety are improved, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of roadheading machines, and more specifically relates to an atmospheric pressure tool changing cutter head with a freezing function. Background technique [0002] Tunnel boring machine is a kind of special construction machinery for tunnel excavation. It has the functions of excavating soil, transporting muck, and lining pipelines. It has been widely used in tunnel projects such as subways, railways, highways, coal mines, and water conservancy and hydropower. The cutting tool is the main tool used by the roadheader to excavate the tunnel face. Once the cutting tool is worn or damaged, it must be replaced in time, otherwise it will seriously affect the construction efficiency and even damage the cutting head. [0003] At present, there are two relatively advanced tool change methods on the market: frozen tool change cutter head and atmospheric pressure tool change cutter head. The frozen tool change cutter ...

AI Technical Summary

Problems solved by technology

The freezing cycle of the frozen tool change cutter is long, and it cannot be used as a conventional tool change method when frequent tool changes are required under harsh geological conditions; Excavation, need to open warehouse operations and other issues

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